Walteb d



Feb. 6, 1923,

HEATING DEVICE.

FILED MAY 2o. 1922.

Patented Feb. td, llglii,

NllTldil rfi) HEATING DEVCE.

Application filed May 20,

To all zo hom t may conce/m Be it known that l, WALTER D. Boonen, a subject of the King oi,E Great Britain, residing at ltawanesa, Province of Manitoba, Canada, have invented certain new and useful Improvements in Heating Devices; and l do hereby declare that the following is a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to nialie and use the saine.

This invention relates to a new and use- Jful heating device, and has Jfor its object the complete and efiicient burning of fuel.

A Yfurther object of the invention is a conibustion chamber having a chimney leading directly troni the fire pot, and an air passage disposed above the lower end of the chimney, so that the draught through the chimney draws air into the lire pot tor the complete combustion of the solid or gaseous hydrocarbons.

rllhe invention is designed particularly for the burning of sott coal and a low grade of lignite. About one third or the weight of such fuels is volatile gases which are readily driven oli by heat. Unless provision is made for burning them1 their` tue] value is lost. li' they areliuconipletely burned7 they cause the production of heavy smoke and a deposit of soot. The principle or this invention as regards the completecombustion of such fuels, consists of means for confining the burning to a relatively thin layer of fuel lorined at the bottom of the fuel containing chamber', together with suitable ineans for supplying the required amount of air at the proper places. As the tuel burns, it drops into the ash receptacle, and is replaced by' fresh fuel gravitating into the burning region because of the weight of the fuel in the containing chamber. l am aware of prior devices in the art which provide for the restriction of the burning region to the lower part of tde fuel containing chamber, but the thickness of said region is approxiniately the saine as the diameter of the fuel containing chamber, instead of relatively thinner as in this invention. The result of reducing the relative size of the burning region in this manner reduces the time required to generate suiiicient heat to burn the volatile products, and increases the ease and accuracy with which the iire may be controlled.

.Further objects and advantages of the in- 1922. Serial No. 562,385.

vention will appear as the description of the embodying principles and structure is developed.

rllhe invention is applicable wherever the combustion ot coal for heating purposes is desired. but ilior illustration is shown as applied to a stove in the accompanying drawing. iu which:

Figure 'l is a vertical section through the stove., the saine being in operation;

Figure 2 is a horizontal section on the line of Figure 1, the fuel being` removed in order to show the grate; and

Figure 3 is a detail vertical section of the air passage.

The stove consists ol' a body l which may be of any desired shape, but is here shown as cylindrical in forni. The body is supported on legs l in the usual manner. A nfilling opening 2 is provided at the top. A portion oi2 a wall oi the body is bent inwardly as at 3. alongl the circumferential line Ll. the lower end of said inclined portion terminating in a straight line 5. At this lower end is provided an upwardly curved lip 6.

vlWithin the body and secured thereto in any desired manner is a :fuel supporting member T here shown as an inwardly inclined grate terminating in lingers 8 which torni the grate openings 9. The disposition of the grate is such that the openings are disposed beneath the line 5 and are spaced somewhat laterally therefrom. A flue or chimney l() is provided in the lower portion of the body and has its entrance end ll dis posed beneath the lip 6 and substantially opposite the grate openings 9. This chimney is co-extensive in width with the lip 6, and the upper wall l2 of the chimney has formed thereon a downwardly curved lip 13 dis` posed above the lip 6 and forming therewith ir passage le; lt is to be noted that the a fire pot l5. draught opening 16 regulated by a door provided in the body adjacent the grate 7 and opposite the inclined wall 3. ln the base of the body is a clean-out opening 18 through which the ashes may be emptied into a pan inserted between the legs on which the body is supported.

ln operation the body is charged with coal through the opening 2. A fire is started in the fire pot with apiece of paper. The draught opening l? is regulated and the air cooperates with the wall 3 in forrnpassing` through the grate openings 9 aids the combustion, the gaseous products being given olf in the vicinity ot the air passage 14. The tendency of the gases to rush through the chimney 10 causes an inrush of air through the passage 14:, which air received in the combustion area and turnishes sutiicient oxygen tor the coniliilete burninc' of the volatile gases. The products `oi: .combustion and the nonfconibustible gaseous products escape through the fine- 10. rThe air passage l/l which is here illustrated as a slit mny be formed in the nature ot openings it desired. The downwardly curved lip i3, in yaddition to modifying the .si-ze ,ot the air passage, serves to shield the glare of the burning fuel. It has been found by experiment that this type of stove burns the cheapest grades of `cofll end gives results that ere well comparable with those obtained by burning the best hard coal in ordinary stoves.

Although al specic application of the invention has been illustrated and described, it is to be understood that the nature of the invention is not limited to the specific details ot' construction presented, but is indicated by the scope .ot the appended claims.

Hering thus Jfully described the invention, `what l claini as new and desire to protect by Letters Patent is:-

1. A heating device comprising a body provided with ineens for supporting a layer ci fuel, the well of said body having air inlet openings therein at opposite sides of seid ineens', and e chimney `extending l'from the portion of the body beneath one ot said openings.

2. A heating device comprising a body having an inclined grate therein, one end of which is spec-ed from the walls ot said body, seid walls haring air inlet openings therein at opposite sides of the grate, end chimney extending troni the portion et' the body beneath one ot seid openings.

A heating device comprising a body having an inclined grate therein, one end of which is spaced trom the walls of the body, the body wall opposite the 'fuel supporting -side of the grate being inclined downwardly towards seid side, a chimney extending from the portion ot the body beneath said inclined wall, the body having air inlet openings formed ,therein at opposite sides of the grate. g

A heating device comprising ya` body having en inclined grate therein, one end ot which is spaced from the walls of the body, the body well opposite the iuel supporting side of the grate being inclined downwardly towards said side, a chimney extending troni the portion ot' the body beneath seid inclined wall, the body having air inlet openings teiinfied therein at opposite sides of the grate, one of said openings being disposed between the inclined wall and the chimney.

5. it heating device comprising a` body having an inclined grate therein, one end ot' which is spaced from the walls of the body, the body well opposite the fuel supporting side of the `strate being` inclined downwardly towards said side, a chimney extending 'troni the portion oi' the body beneath seid inclined well, the body having nir inlet openings :formed therein :it opposite sides ot' the grate, one ol seid openings being disposed between the inclined wall and the chimney, and spaced overlapping lips within said last named opening.

In witness whereof l have hereunto set iny hand.

- WALTER D. BOGKER. 1With .ess

L. Aiiinson. 

